14.3 Find the location of the transmission zeros and the type of the third-order filter whose numerator polynomial is: (a) K, (b) Ks, (c) Ks2, and (d) Ks3, where K is a constant. (a) three zeros at s = ∞, low-pass; (b) one zero at s = 0 and two zeros at s = ∞, bandpass; (c) two zeros at s = 0 and one zero at s = ∞, bandpass; (d) three zeros at s = 0, high-pass.